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        <li class="header">第 Ⅰ 部分：PostGIS基础</li>
        
        
    
        <li class="chapter " data-level="1.1" data-path="../../">
            
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                    Introduction
            
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        <li class="chapter " data-level="1.2" >
            
                <span>
            
                    
                    一 初识PostGIS
            
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        <li class="chapter " data-level="1.2.1" data-path="../../introduction/PostgisAbility.html">
            
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                    1.1 PostGIS特性
            
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        <li class="chapter " data-level="1.2.2" data-path="../../introduction/PostgisAbility.html">
            
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                    1.2 PostGIS使用场景
            
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        <li class="chapter " data-level="1.2.2.1" data-path="../../installation/PostgreSQL Installation.html">
            
                <a href="../../installation/PostgreSQL Installation.html">
            
                    
                    1.2.1 适用场景
            
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        <li class="chapter " data-level="1.2.2.2" data-path="../../installation/PostGIS Installation.html">
            
                <a href="../../installation/PostGIS Installation.html">
            
                    
                    1.2.2 不适用场景
            
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            </ul>
            
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        <li class="chapter " data-level="1.2.3" data-path="../../introduction/PostgisAbility.html">
            
                <a href="../../introduction/PostgisAbility.html">
            
                    
                    1.3 PostGIS使用建议
            
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        <li class="chapter " data-level="1.2.4" >
            
                <span>
            
                    
                    1.4 PostGIS安装
            
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        <li class="chapter " data-level="1.2.4.1" data-path="../../installation/PostgreSQL Installation.html">
            
                <a href="../../installation/PostgreSQL Installation.html">
            
                    
                    1.4.1 PostgreSQL安装
            
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        <li class="chapter " data-level="1.2.4.2" data-path="../../installation/PostGIS Installation.html">
            
                <a href="../../installation/PostGIS Installation.html">
            
                    
                    1.4.2 PostGIS安装
            
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        <li class="chapter " data-level="1.2.5" data-path="../../introduction/ReleaseNotes.html">
            
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                    1.5 PostGIS重大版本
            
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                    二 PostGIS入门
            
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        <li class="chapter " data-level="1.3.1" >
            
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                    2.1 客户端介绍
            
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        <li class="chapter " data-level="1.3.1.1" >
            
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                    2.1.1 psql
            
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        <li class="chapter " data-level="1.3.1.2" >
            
                <span>
            
                    
                    2.1.2 qgis
            
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        <li class="chapter " data-level="1.3.2" >
            
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                    2.2 空间数据库
            
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                <span>
            
                    
                    2.3 数据导入
            
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        <li class="chapter " data-level="1.3.3.1" >
            
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                    2.3.1 shp
            
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                <span>
            
                    
                    2.3.2 csv
            
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        <li class="chapter " data-level="1.3.3.3" >
            
                <span>
            
                    
                    2.3.3 excel
            
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            </ul>
            
        </li>
    

            </ul>
            
        </li>
    

    
        
        <li class="header">第 Ⅱ 部分：API手册</li>
        
        
    
        <li class="chapter " data-level="2.1" >
            
                <span>
            
                    
                    八 矢量函数
            
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        <li class="chapter " data-level="2.1.1" >
            
                <span>
            
                    
                    8.2 空间表管理
            
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        <li class="chapter " data-level="2.1.1.1" data-path="AddGeometryColumn.html">
            
                <a href="AddGeometryColumn.html">
            
                    
                    8.2.1 AddGeometryColumn
            
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        <li class="chapter " data-level="2.1.1.2" data-path="DropGeometryColumn.html">
            
                <a href="DropGeometryColumn.html">
            
                    
                    8.2.2 DropGeometryColumn
            
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        <li class="chapter " data-level="2.1.1.3" data-path="DropGeometryTable.html">
            
                <a href="DropGeometryTable.html">
            
                    
                    8.2.3 DropGeometryTable
            
                </a>
            

            
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        <li class="chapter " data-level="2.1.1.4" data-path="Find_SRID.html">
            
                <a href="Find_SRID.html">
            
                    
                    8.2.4 Find_SRID
            
                </a>
            

            
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        <li class="chapter " data-level="2.1.1.5" data-path="Populate_Geometry_Columns.html">
            
                <a href="Populate_Geometry_Columns.html">
            
                    
                    8.2.5 Populate_Geometry_Columns
            
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        <li class="chapter active" data-level="2.1.1.6" data-path="UpdateGeometrySRID.html">
            
                <a href="UpdateGeometrySRID.html">
            
                    
                    8.2.6 UpdateGeometrySRID
            
                </a>
            

            
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            </ul>
            
        </li>
    
        <li class="chapter " data-level="2.1.2" >
            
                <span>
            
                    
                    8.4 元数据读写
            
                </span>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="2.1.2.1" data-path="../Accessors.html">
            
                <a href="../Accessors.html#GeometryType">
            
                    
                    GeometryType
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.2" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_GeometryType">
            
                    
                    ST_GeometryType
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.3" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_CoordDim">
            
                    
                    ST_CoordDim与ST_NDims
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.4" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_Dimension">
            
                    
                    ST_Dimension
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.5" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_Zmflag">
            
                    
                    ST_Zmflag
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.6" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_HasArc">
            
                    
                    ST_HasArc
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.7" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_IsPolygonCCW">
            
                    
                    ST_IsPolygonCCW
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.8" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_IsPolygonCW">
            
                    
                    ST_IsPolygonCW
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.9" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_IsClosed">
            
                    
                    ST_IsClosed
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.10" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_IsCollection">
            
                    
                    ST_IsCollection
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.11" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_IsEmpty">
            
                    
                    ST_IsEmpty
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.12" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_IsRing">
            
                    
                    ST_IsRing
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.13" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_IsSimple">
            
                    
                    ST_IsSimple
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.14" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_Boundary">
            
                    
                    ST_Boundary
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.15" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_Envelope">
            
                    
                    ST_Envelope
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.16" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_BoundingDiagonal">
            
                    
                    ST_BoundingDiagonal
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.17" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_X">
            
                    
                    ST_X,ST_Y,ST_Z,ST_M
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.18" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_StartPoint">
            
                    
                    ST_StartPoint,ST_EndPoint
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.19" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_NumGeometries">
            
                    
                    ST_NumGeometries,ST_GeometryN
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.20" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_NRings">
            
                    
                    ST_NRings,ST_ExteriorRing,ST_NumInteriorRings,ST_NumInteriorRing,ST_InteriorRingN
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.21" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_NumPatches">
            
                    
                    ST_NumPatches,ST_PatchN
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.22" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_NPoints">
            
                    
                    ST_NPoints,ST_NumPoints,ST_PointN,ST_Points
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.23" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_MemSize">
            
                    
                    ST_MemSize
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.24" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_Summary">
            
                    
                    ST_Summary
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2.25" data-path="../Accessors.html">
            
                <a href="../Accessors.html#ST_Dump">
            
                    
                    ST_Dump,ST_DumpPoints,ST_DumpRings
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="2.1.3" >
            
                <span>
            
                    
                    8.11 空间关系
            
                </span>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="2.1.3.1" data-path="../SpatialRelationships.html">
            
                <a href="../SpatialRelationships.html#ST_Intersects">
            
                    
                    ST_Intersects
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.3.2" data-path="../SpatialRelationships.html">
            
                <a href="../SpatialRelationships.html#ST_Intersects">
            
                    
                    ST_Disjoint
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.3.3" data-path="../SpatialRelationships.html">
            
                <a href="../SpatialRelationships.html#ST_Contains">
            
                    
                    ST_Contains
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.3.4" data-path="../SpatialRelationships.html">
            
                <a href="../SpatialRelationships.html#ST_Contains">
            
                    
                    ST_Within
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.3.5" data-path="../SpatialRelationships.html">
            
                <a href="../SpatialRelationships.html#ST_Equals">
            
                    
                    ST_Equals
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.3.6" data-path="../SpatialRelationships.html">
            
                <a href="../SpatialRelationships.html#ST_ContainsProperly">
            
                    
                    ST_ContainsProperly
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.3.7" data-path="../SpatialRelationships.html">
            
                <a href="../SpatialRelationships.html#ST_Covers">
            
                    
                    ST_Covers
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.3.8" data-path="../SpatialRelationships.html">
            
                <a href="../SpatialRelationships.html#ST_Covers">
            
                    
                    ST_CoveredBy
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.3.9" data-path="../SpatialRelationships.html">
            
                <a href="../SpatialRelationships.html#ST_Overlaps">
            
                    
                    ST_Overlaps
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.3.10" data-path="../SpatialRelationships.html">
            
                <a href="../SpatialRelationships.html#ST_Overlaps">
            
                    
                    ST_Crosses
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.3.11" data-path="../SpatialRelationships.html">
            
                <a href="../SpatialRelationships.html#ST_Touches">
            
                    
                    ST_Touches
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.3.12" data-path="../SpatialRelationships.html">
            
                <a href="../SpatialRelationships.html#ST_Relate">
            
                    
                    ST_Relate
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.3.13" data-path="../SpatialRelationships.html">
            
                <a href="../SpatialRelationships.html#ST_RelateMatch">
            
                    
                    ST_RelateMatch
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="2.1.4" >
            
                <span>
            
                    
                    8.12 空间测量
            
                </span>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="2.1.4.1" data-path="../Measurement/ST_3DClosestPoint.html">
            
                <a href="../Measurement/ST_3DClosestPoint.html#ST_3DClosestPoint">
            
                    
                    ST_3DClosestPoint
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.4.2" data-path="../Measurement/ST_3DDistance.html">
            
                <a href="../Measurement/ST_3DDistance.html">
            
                    
                    ST_3DDistance
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.4.3" data-path="../Measurement/ST_Angle.html">
            
                <a href="../Measurement/ST_Angle.html">
            
                    
                    ST_Angle
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.4.4" data-path="../Measurement/ST_Area.html">
            
                <a href="../Measurement/ST_Area.html">
            
                    
                    ST_Area
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.4.5" data-path="../Measurement/ST_Azimuth.html">
            
                <a href="../Measurement/ST_Azimuth.html">
            
                    
                    ST_Azimuth
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.4.6" data-path="../Measurement/ST_ClosestPoint.html">
            
                <a href="../Measurement/ST_ClosestPoint.html">
            
                    
                    ST_ClosestPoint
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.4.7" data-path="../Measurement/ST_Distance.html">
            
                <a href="../Measurement/ST_Distance.html">
            
                    
                    ST_Distance
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.4.8" data-path="../Measurement/ST_Project.html">
            
                <a href="../Measurement/ST_Project.html">
            
                    
                    ST_Project
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="2.1.5" >
            
                <span>
            
                    
                    8.14 仿射变换
            
                </span>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="2.1.5.1" data-path="../AffineTransformations/ST_Affine.html">
            
                <a href="../AffineTransformations/ST_Affine.html#ST_Affine">
            
                    
                    ST_Affine
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.5.2" data-path="../AffineTransformations/ST_Rotate.html">
            
                <a href="../AffineTransformations/ST_Rotate.html">
            
                    
                    ST_Rotate
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.5.3" data-path="../AffineTransformations/ST_RotateX.html">
            
                <a href="../AffineTransformations/ST_RotateX.html">
            
                    
                    ST_RotateX
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.5.4" data-path="../AffineTransformations/ST_RotateY.html">
            
                <a href="../AffineTransformations/ST_RotateY.html">
            
                    
                    ST_RotateY
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.5.5" data-path="../AffineTransformations/ST_RotateZ.html">
            
                <a href="../AffineTransformations/ST_RotateZ.html">
            
                    
                    ST_RotateZ
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.5.6" data-path="../AffineTransformations/ST_Scale.html">
            
                <a href="../AffineTransformations/ST_Scale.html">
            
                    
                    ST_Scale
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.5.7" data-path="../AffineTransformations/ST_Translate.html">
            
                <a href="../AffineTransformations/ST_Translate.html">
            
                    
                    ST_Translate
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.5.8" data-path="../AffineTransformations/ST_TransScale.html">
            
                <a href="../AffineTransformations/ST_TransScale.html">
            
                    
                    ST_TransScale
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="2.1.6" >
            
                <span>
            
                    
                    8.15 空间聚类
            
                </span>
            

            
            <ul class="articles">
                
    
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        <a href="../.." >8.2.6 UpdateGeometrySRID</a>
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                                <h2 id="updategeometrysrid">UpdateGeometrySRID</h2>
<h3 id="&#x65B9;&#x6CD5;&#x529F;&#x80FD;&#x63CF;&#x8FF0;">&#x65B9;&#x6CD5;&#x529F;&#x80FD;&#x63CF;&#x8FF0;</h3>
<p>&#x8BE5;&#x65B9;&#x6CD5;&#x5C06;&#x66F4;&#x65B0;&#x8868;&#x7684;srid&#x5143;&#x6570;&#x636E;&#x4FE1;&#x606F;&#xFF0C;&#x540C;&#x65F6;&#x66F4;&#x65B0;geometry&#x5217;&#x4E2D;&#x6240;&#x6709;&#x56FE;&#x5F62;&#x7684;srid&#x3002;</p>
<h3 id="&#x51FD;&#x6570;&#x5B9A;&#x4E49;">&#x51FD;&#x6570;&#x5B9A;&#x4E49;</h3>
<p>1 &#x5047;&#x8BBE;&#x8868;&#x5728;&#x9ED8;&#x8BA4;&#x7684;public&#x4E0B;&#xFF0C;&#x53EF;&#x4E0D;&#x8BBE;&#x7F6E;shema_name&#xFF1A;</p>
<pre class="language-"><code>text UpdateGeometrySRID(varchar table_name, varchar column_name, integer srid);
</code></pre><p>&#x53C2;&#x6570;&#x5B9A;&#x4E49;&#xFF1A;
    table_name: &#x6307;&#x5B9A;&#x9700;&#x8981;&#x4FEE;&#x6539;&#x7684;&#x8868;&#x540D;&#x79F0;
    column_name&#xFF1A; &#x6307;&#x5B9A;&#x65B0;&#x5EFA;geometry&#x7C7B;&#x578B;&#x5217;&#x7684;&#x540D;&#x79F0;
    srid&#xFF1A;&#x5750;&#x6807;&#x7CFB;epsg&#x7F16;&#x53F7;</p>
<ol>
<li>&#x5047;&#x8BBE;&#x8868;&#x4E0D;&#x5728;&#x9ED8;&#x8BA4;&#x7684;public&#x4E0B;&#xFF0C;&#x9700;&#x660E;&#x786E;&#x6307;&#x5B9A;shema_name&#xFF1A;</li>
</ol>
<pre class="language-"><code>text UpdateGeometrySRID(varchar schema_name, varchar table_name, varchar column_name, integer srid);
</code></pre><ol>
<li>&#x5047;&#x8BBE;&#x8868;&#x4E0D;&#x5728;&#x9ED8;&#x8BA4;&#x7684;catalog&#x4E0B;&#xFF0C;&#x9700;&#x660E;&#x786E;&#x6307;&#x5B9A;catalog_name&#xFF1A;</li>
</ol>
<pre class="language-"><code>text UpdateGeometrySRID(varchar catalog_name, varchar schema_name, varchar table_name, varchar column_name, integer
srid);
</code></pre><h3 id="&#x5E94;&#x7528;&#x793A;&#x4F8B;">&#x5E94;&#x7528;&#x793A;&#x4F8B;</h3>
<p>&#x5728;public schema&#x4E0B;&#x65B0;&#x5EFA;&#x6D4B;&#x8BD5;&#x7A7A;&#x95F4;&#x8868;&#xFF0C;&#x4F46;&#x662F;&#x6CA1;&#x6709;&#x5B9A;&#x4E49;&#x56FE;&#x5F62;&#x7684;&#x5750;&#x6807;&#x7CFB;&#xFF1A;</p>
<pre class="language-"><code>drop table if exists mytest cascade;
create table mytest(
    gid serial primary key,  --&#x81EA;&#x589E;&#x4E3B;&#x952E;
    name text,   --&#x540D;&#x79F0;
    geom geometry(Point)
);
</code></pre><p>&#x63D2;&#x5165;&#x6D4B;&#x8BD5;&#x6570;&#x636E;&#xFF1A;</p>
<pre class="language-"><code>insert into mytest(name,geom) values (&apos;a&apos;,ST_MakePoint(118,32));
insert into mytest(name,geom) values (&apos;b&apos;,ST_MakePoint(119,33));
</code></pre><p>&#x67E5;&#x8BE2;&#x8BE5;&#x8868;&#x7684;&#x5750;&#x6807;&#x7CFB;&#xFF1A;</p>
<pre class="language-"><code>select  find_srid(&apos;public&apos;,&apos;mytest&apos;,&apos;geom&apos;);
 find_srid 
-----------
      0
(1 row)

#&#x4E0A;&#x9762;&#x8BED;&#x53E5;&#x7B49;&#x4EF7;&#x4E8E;&#x4E0B;&#x9762;&#x539F;&#x751F;sql&#x8BED;&#x53E5;&#xFF1A;
select srid from geometry_columns where f_table_schema=&apos;public&apos; and f_table_name=&apos;mytest&apos; and f_geometry_column=&apos;geom&apos;;
 srid 
-----------
      0
(1 row)
</code></pre><p>&#x67E5;&#x8BE2;&#x8868;&#x4FE1;&#x606F;&#x53EF;&#x77E5;&#xFF0C;&#x76EE;&#x524D;&#x8BE5;&#x8868;&#x6CA1;&#x6709;&#x5B9A;&#x4E49;&#x5750;&#x6807;&#x7CFB;&#xFF0C;&#x9ED8;&#x8BA4;&#x503C;&#x662F;0.
&#x67E5;&#x8BE2;&#x8BE5;&#x8868;&#x4E2D;&#x56FE;&#x5F62;&#x5BF9;&#x8C61;&#x7684;&#x5750;&#x6807;&#x7CFB;&#xFF1A;</p>
<pre class="language-"><code>select gid,st_srid(geom) from mytest;
 gid |st_srid  
----+---------------
  1 | 0
  2 | 0
(2 row)
</code></pre><p>&#x67E5;&#x8BE2;&#x8868;&#x4E2D;&#x56FE;&#x5F62;&#x5BF9;&#x8C61;&#x4FE1;&#x606F;&#x53EF;&#x77E5;&#xFF0C;&#x76EE;&#x524D;&#x6240;&#x6709;&#x8981;&#x7D20;&#x7684;&#x56FE;&#x5F62;&#x5BF9;&#x8C61;&#x90FD;&#x6CA1;&#x6709;&#x5B9A;&#x4E49;&#x5750;&#x6807;&#x7CFB;&#xFF0C;&#x9ED8;&#x8BA4;&#x503C;&#x662F;0.</p>
<p>&#x6267;&#x884C;UpdateGeometrySRID&#x51FD;&#x6570;&#xFF1A;</p>
<pre class="language-"><code>SELECT UpdateGeometrySRID(&apos;mytest&apos;,&apos;geom&apos;,4326);

 updategeometrysrid 
----------------------------------------
public.mytest.geom SRID changed to 4326
(1 row)
</code></pre><p>&#x68C0;&#x67E5;&#x76EE;&#x524D;&#x7684;&#x8868;&#x4E0E;&#x8868;&#x4E2D;&#x6570;&#x636E;&#x5750;&#x6807;&#x7CFB;&#xFF1A;</p>
<pre class="language-"><code>select  find_srid(&apos;public&apos;,&apos;mytest&apos;,&apos;geom&apos;);
 find_srid 
-----------
    4326
(1 row)


select gid,st_srid(geom) from mytest;
 gid |st_srid  
----+---------------
  1 | 4326
  2 | 4326
(2 row)
</code></pre><p>&#x7ED3;&#x8BBA;&#xFF1A;&#x4F7F;&#x7528;UpdateGeometrySRID&#x6539;&#x53D8;&#x4E86;&#x8868;&#x7684;&#x5750;&#x6807;&#x7CFB;&#x5B9A;&#x4E49;&#xFF0C;&#x4ECE;geometry(Point)&#x7C7B;&#x578B;&#x6539;&#x53D8;&#x6210;&#x4E86;geometry(Point,4326)&#x7C7B;&#x578B;&#xFF0C;&#x540C;&#x65F6;&#xFF0C;&#x56FE;&#x5F62;&#x5217;&#x4E2D;&#x6240;&#x6709;&#x56FE;&#x5F62;&#x5BF9;&#x8C61;&#x4E5F;&#x90FD;&#x5F3A;&#x5236;&#x751F;&#x6210;&#x4E86;&#x5BF9;&#x5E94;&#x7684;&#x5750;&#x6807;&#x7CFB;&#x3002;</p>
<h3 id="&#x4F7F;&#x7528;&#x9650;&#x5236;&#x8BF4;&#x660E;">&#x4F7F;&#x7528;&#x9650;&#x5236;&#x8BF4;&#x660E;</h3>
<p>UpdateGeometrySRID&#x51FD;&#x6570;&#x901A;&#x5E38;&#x60C5;&#x51B5;&#x4E0B;&#x7528;&#x4E8E;&#x66F4;&#x65B0;&#x5B8C;&#x5584;&#x7A7A;&#x95F4;&#x8868;&#x548C;&#x6570;&#x636E;&#x7684;&#x5750;&#x6807;&#x7CFB;&#xFF0C;&#x4F46;&#x8FD9;&#x6709;&#x51E0;&#x4E2A;&#x524D;&#x63D0;&#xFF1A;<strong>&#x7A7A;&#x95F4;&#x8868;&#x4E2D;&#x7684;&#x6570;&#x636E;&#x90FD;&#x5FC5;&#x987B;&#x662F;&#x540C;&#x4E00;&#x4E2A;&#x5750;&#x6807;&#x7CFB;&#xFF0C;&#x4E14;&#x51FD;&#x6570;&#x6267;&#x884C;&#x8005;&#x660E;&#x786E;&#x77E5;&#x9053;&#x8868;&#x4E2D;&#x6570;&#x636E;&#x6240;&#x5BF9;&#x5E94;&#x7684;&#x6B63;&#x786E;&#x7684;&#x5750;&#x6807;&#x7CFB;&#x3002;</strong></p>
<p>&#x524D;&#x6587;&#x63D2;&#x5165;&#x7684;&#x6D4B;&#x8BD5;&#x6570;&#x636E;&#x662F;(118,32)&#xFF0C;(119,33)&#x4E24;&#x4E2A;&#x70B9;&#xFF0C;&#x5F88;&#x660E;&#x663E;&#x6211;&#x4EEC;&#x80FD;&#x770B;&#x51FA;&#x8FD9;&#x662F;&#x7ECF;&#x7EAC;&#x5EA6;&#x5750;&#x6807;&#xFF0C;&#x5BF9;&#x5E94;epsg:4326&#xFF0C;&#x6240;&#x4EE5;&#x6211;&#x4EEC;&#x660E;&#x786E;&#x6307;&#x660E;&#x5C06;&#x8868;&#x66F4;&#x65B0;&#x4E3A;4326&#x5750;&#x6807;&#x7CFB;&#x3002;&#x5047;&#x8BBE;&#xFF0C;(119,33)&#x70B9;&#x66FF;&#x6362;&#x4E3A;(13247019.4043996,3895303.96339389)&#xFF0C;&#x90A3;&#x4E48;&#x6267;&#x884C;&#x8BE5;&#x51FD;&#x6570;&#x91CF;&#x62A5;&#x9519;&#x3002;&#x540C;&#x6837;&#xFF0C;&#x8868;&#x4E2D;&#x5750;&#x6807;&#x4E0D;&#x662F;&#x5E38;&#x89C1;&#x7684;&#x7ECF;&#x7EAC;&#x5EA6;&#x548C;&#x58A8;&#x5361;&#x6258;&#xFF0C;&#x64CD;&#x4F5C;&#x8005;&#x81EA;&#x5DF1;&#x4E5F;&#x4E0D;&#x77E5;&#x9053;&#x8FD9;&#x4E2A;&#x6570;&#x636E;&#x662F;&#x4EC0;&#x4E48;srid&#xFF0C;&#x90A3;&#x4E48;&#x4E5F;&#x5C31;&#x6CA1;&#x6CD5;&#x53BB;&#x66F4;&#x65B0;&#x8868;&#x7684;&#x5750;&#x6807;&#x7CFB;&#x4E86;&#x3002;</p>
<p>&#x5B9E;&#x9645;&#x4E0A;&#xFF0C;&#x8BE5;&#x51FD;&#x6570;&#x672C;&#x8D28;&#x5C31;&#x662F;&#x6539;&#x53D8;&#x4E86;&#x8868;&#x7684;&#x5B57;&#x6BB5;&#x7C7B;&#x578B;&#xFF0C;&#x6211;&#x4EEC;&#x53EF;&#x4EE5;&#x7528;&#x539F;&#x751F;&#x7684;sql&#x8BED;&#x6CD5;&#x8868;&#x793A;&#xFF1A;</p>
<pre class="language-"><code>ALTER TABLE mytest
ALTER COLUMN geom TYPE geometry(Point, 4326)
USING ST_SetSRID(geom,4326);
</code></pre><p>&#x539F;&#x751F;&#x8BED;&#x6CD5;&#x5176;&#x5B9E;&#x66F4;&#x52A0;&#x7075;&#x6D3B;&#xFF0C;&#x8BBE;&#x7F6E;&#x53EF;&#x4EE5;&#x4FEE;&#x6539;geom&#x5217;&#x4E3A;&#x5176;&#x4ED6;&#x5750;&#x6807;&#x7CFB;&#x3002;</p>
<p>&#x4F8B;&#x5982;&#xFF0C;&#x6D4B;&#x8BD5;&#x6570;&#x636E;&#x662F;&#x7ECF;&#x7EAC;&#x5EA6;&#xFF0C;&#x4F46;&#x662F;&#x6CA1;&#x5B9A;&#x4E49;&#x5750;&#x6807;&#x7CFB;&#xFF0C;&#x76EE;&#x524D;&#x56E0;&#x9700;&#x6C42;&#x9700;&#x8981;&#xFF0C;&#x9700;&#x8981;&#x5C06;&#x8BE5;&#x8868;&#x5B9A;&#x4E49;&#x6210;&#x58A8;&#x5361;&#x6258;&#x5750;&#x6807;&#x7CFB;&#xFF08;3857&#xFF09;&#xFF1A;</p>
<pre class="language-"><code>ALTER TABLE mytest
ALTER COLUMN geom TYPE geometry(Point, 3857)
USING ST_TransForm(ST_SetSRID(geom,4326),3857);
</code></pre><p>&#x603B;&#x7ED3;&#xFF1A;&#x5C3D;&#x91CF;&#x4F7F;&#x7528;&#x539F;&#x751F;sql&#x8BED;&#x6CD5;&#xFF0C;&#x5982;&#x679C;&#x4F60;&#x6BD4;&#x8F83;&#x719F;&#x6089;sql&#x7684;&#x8BDD;&#x3002;UpdateGeometrySRID&#x5728;&#x5927;&#x90E8;&#x5206;&#x60C5;&#x51B5;&#x4E0B;&#x5176;&#x5B9E;&#x662F;&#x53EF;&#x4EE5;&#x4F7F;&#x7528;&#x7684;&#xFF0C;&#x4F46;&#x662F;&#x4E0D;&#x5982;&#x539F;&#x751F;&#x7684;sql&#x529F;&#x80FD;&#x5F3A;&#x5927;&#x4E0E;&#x7075;&#x6D3B;&#x3002;</p>

                                
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